The Study Of Fracture Distribution Rule In Budate Group Buried Hill Of Sudeerte Tectonic Belt

By use of geological data such as Seismic,well logging ,lithology, produce testing etc. based on core observation ,section analysis,image logging data analysis ,fracture distribution rule in Budate Group Buried Hill of Sudeerte Tectonic Belt is described ,the results show that there develops fractures universally:mainly include tectoclase(gash fracture, shearing fracture), secondly corroded fractus and a little interjacent fractures.Fracture width regards high angle 1～5mm and 0.1～1mm as principle.Fracture orientation is mainly NEE NE NNW.Fractures for 4～5 periods are mainly developed and mostly have been filled or half filled, only a few are open.The genetic mechanism of fracture in this areas has many kinds,but mainly is tectonic stress.The lithologic character of Budate Group reservoir in Sudeerte oilfield is very complex and has great inhomogeneity. Fracture is important reservoir space, corroded fissure or hole is the secondary. It belongs to a two–porous media reservoir. The identification and prediction to network fracture is the core of reservoir evaluation.We study the rule of fracture distribution based on image logging data interpretation and statistic. Considering the fraction log response characteristic in the conventional log,we establish the method of fracture identification comprehensive probability which formed from the data processing of conventional log. Coincidence rate is high by comparing the results with the cores and well testing.MVE fracture prediction technique is introduced to enhance precision of prediction .By studing the structure characteristic and the evolving process of buried hills, We use MVE to analyse strain curvature and stress, to predict the fracture distributions orientation and gating of fracture,and to analyse the fracture model connectivity and open, based on the structure elucidation results.The results show that the fractures which orientations are NE NNE and NNW are mostly developed in this area ,have great density and open well.The predicted results are in good agreement with those from logging data.The finding has great important to the development evaluation in Budate Group buried hill fractured reservoir...